RV-3029 Datasheet, PDF (31/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock

Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3029
4.4.1.TIMER INTERRUT
The generation of Interrupts from the Countdown Timer function is enabled by “TIE” = “1” (bit 1 in register
Control_INT). If Timer Interrupt is enabled by “TIE” = “1”, the Timer Flag “TF” (bit 1 in register Control_INT Flag) will
be set = “1” at the end of every Timer countdown.
The Interrupt signal INT follows the condition of Timer Flag “TF” (bit 1 in register Control_INT Flag), the Timer Flag
“TF” and the Interrupt signal ( INT ) remain set until cleared by software writing “TF” = “0”.
Timer Interrupt Control (addresses 01h / 02h…bits description)
Address
Function
Bit 7
Bit 6
Bit 5
01h
Control_INT
X
X
X
Bit 4
SRIE
Bit 3
V2IE
Bit 2
V1IE
Bit 1
TIE
Bit 0
AIE
bit 1
TIE
0
TF is disabled, no Timer Interrupt generated
1
TF is enabled, Timer Interrupt generated when Countdown Timer value
reaches zero and TF is set “1”
02h
Control_INT Flag
X
X
X
SRF
V2IF V1IF
TF
AF
bit 1
TF
0
No Timer Interrupt generated
Timer Flag is set “1” when TIE is enabled and Countdown Timer value
1
reaches zero, TF needs to be cleared to clear INT
Bit positions labelled as “X” are not implemented and will return a “0” when read.
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